Multicolor decoration of vitreous objects



UNITED vitreous substances, suchvas papery, n

colon: n 1; i a The above outlined difilcultiesuare eliminated i and the desirable results set iorth hereinflobfl ahatma M100 ZESP a b OBJECTS 1 Henry FQScheetz,".lr PittsburglilIfa. Q

tion ofvitreous objects suchas glass; chinaypor with the object to be decorated and in the {using of such coloring material there isa very objecjtionable tendency for :the coloring material to be opaque andyinaccurately deposited; and for a the colors toblendimproperly thereby losing much of thesdetail and beauty of the design which would rernainyas desired wherethefprinting is donein ordinary ink orydye colors upon non- Considerable difficulty has been likewise countered [in "obtaining satisfactory multi-color effects on Vitreous object s rbec'ause during the fusing-operation the sizing material or adhesive with which },the ceramic coloring material is toxthe vitreouslobjectyorto thetreatecl yitreo u s I object itselfinitheform of a multiplicity oi spaced i dotsor lines whichhave interstices between them through which gas may escape during fusingfof of remarkably effective results.

material., Half-tonepr'ocess color plates. embody? ing difierentcolor phases of the design are photo- I n .mechanically prepared ;by the useaof special on l a line screensand the desiredcoloringmaterialsn1 I t appliedsuccessively bythe plates tothe coated portion pf the object; Say-reason of thei'act that theme of ha1f+tone plates forcolor application bonded tokeitjher the vitrfeous objectiitsel fidr a 1 1 decalcomania, which is mostf'f requently:usedin v processespf this-sort,;isconverted intogas and a inescaping"causes blistering oi the coloredsur +face; While this difiiculty isjencountered even in single color application, the overlappingcolors formed in frnulti-color printing ,constitute; .a' blanket so thick where thecolors overlap} that and blistering the spreading or the; ceramic,colorineiriatenal n Press l thQ -p i z, et i 30 escape of the gasesior ned lsseriouslyimpaired t verthese portions is they cause oi agreat-deal of spoilagepj i The invention setgforth hereinnot pnly itilizes obtains *a wide range of j/colorygradation, as to both tone andintensity, a ifew colors rso applied constitute lnfeifect a substitute fora greater numberof colors applied in anyfotherway. The ceramicf coloring may be appliedby any of the various mown processes such as" stonegletter Whether dots or lines} a dots tolrmed upon the plateffor eachcolorfi will by reason jof the fact thatthe colorin material asappliedby myimprovedlprocessdoes not form' a solid blanket over thedesignflotjthevdecalco maniaor the design on the object, regardless of 3 the number oiicllflerent colors'used, andior that an reasonpassages are proyitiedthrough whichthe gaa' formed during the Ijufsing operation mayesg eruption otthe {applied cape without causin tained through the application of; the ceramic coloring material, either 7toflthejdecalcomania l havej afspeciflc relative position with reference to the dots by which another colorfisjj applied.

reproduction of the masterde'sign and color.

substantially eliminating blisters which" occurjin ordinary color printing by'onfe processor another where the colorcoatsoyerlap.

Several color applications may be m ade by means of such half-toneplates and the; breathing spaces yvill not thereby befeli ninatedi Further more, by Treason of the fact that] the screening process used in forming a the" plates obtains such a wideg'radationof intensityfor each single color,

a .i'ew color applications so graded in intensity will obtain results comparable and superior be cause of the'mode oLappIication, to results at tainedin other processes by the use or numerous re used inlmakinithe half-tone plates, the screens throug h whichj the plates are photographically} madejrshould be turnedat Various speciflcfangles fiioieajch' color and, since the screens usedjffor' eachcolor preier ably have thesaine numberofflines, the resultant While the invention is described above in con neetion with the direct application by printing to the vitreous object itself, it is equally applicable to all known procedures for the application of ceramic coloring material to vitreous objects. For instance, the same advantages are derived in the same way and the same diihculties overcome through use of my invention where the decorative J 'over the ceramic coloring material or oxides to be applied and completely over the dots or spaces between the particles .of ceramic coloring or oxides; to betapplied to the" transfer-sheet or object by the precedures outlined above.

By thisim'ethod it ispossible to stock and use identical ceramic color decalcomania sheets.

, Then when a particular order is placed, a flux design is printed directly on the vitreous object I in some suitable sizing or bond to which ceramic coloring material is later applied by means'of dusting.

The invention duction of decalcomanias or transfer sheets hearing a design to be later transferred to the vitreous object and fused thereon. When decalcomanias ofany kind are applied to the vitreous object they must be attached with some bonding mate'- rial such as decal varnish or dextrine gumming, etc. This means the adhesive is between the decalcomania and the object on which the decoration is to be fused. In order for the fusing to take place, the adhesive must pass'oif as a gas and this is particularly well and uniformly accomplished when my invention is used. Even if there are a number ofcolors, and the dots do overlap, they form scales which permit the gas to come out between them and then, when the fusing takes place after the gas escapes, thecolors bind together.

Where such transfer sheets are used the decis likewise applicable to the pro-' which is suitable for the specific work to be decorated is run over topof all the design, in-

cluding the spaces between the spots of ceramic L color; Thissubstantially; decreases the number of colors, or the number ofdecalcomania sheets, which'need be kept in stock and insures satis I faction to the customer because of the fact that the final-coating of flux is particularly'suited to his needs. This procedure also gives a desir.--

able added luster'and protection, as well as additional'bond to the applied-decoration or design; What I claimisx; 1. That method of -decorating a vitreous object with'amulti-color design by ceramic color'deposits whichcomprises the' steps' of coating that a portion of the surfaceto be decorated witha suitable bond, successivelyapplying separately different ceramic colors thereto in the form of a multiplicity of spaced colored lines or dots, all

those of each color beirigspecifically angulated with respect to allof each othercolor andform ing interstices between'color deposits, and fusing the color 'to the object at 'a temperature sufiicient togasifyi thelboncling material and expel the same 'through the said interstices.

lines or dots, all those for each color'bein'g spef cifically angulated with respect to all those for each other color and forming interstices therebetween, successively dustingdiiferentportions stood that a flux of suitable composition can be used over the whole design including the dots between the colors or entirely over any portion of the design in order to control thefusion point of any set of colors or oxides, whether they would fire without this coating at either a higher 01f lower temperature. This is not to be confused with applying flux to underglaze decalcomanias for the purpose ofmechanically holding the design during a hardening-on (or preheating, to

destroy varnish gases) and for future handling during and after glazing operations. Hitherto the flux used to control the fusion point has been mixed with the coloring matter and other more or less inert materials." 5 I However, it is important in the preparation of ceramic colors for ceramic decalcomanias, or for direct printing of ceramiccolors on objects, .that fluxes be incorporated in the color whichhave fusing temperatures compatible with the fusingv temperatures of the particular vitreous objects to which the color design is to be applied. The fusing temperatures of various types of glassware, porcelain, pottery, etc., differ considerably, and a flux of the same fusing temperature is not suitable for use with all kinds andtypes of, vitreous ware. For that reason I print a flux of the imprinted design separatel'y with diflerent ceramic coloring materials, and fusingthe color to the object at a temperature suflicient togasify the bonding material'and the said interstices. g ,4

3. Thati method of "inulti-color" decorating vitreous objects which comprises the steps of forming a transfer sheet by' applying'to the sm I face thereof a ""ceramic color'bondfseparately applying a such bond successive'difiereritce ramic coloring materials in the form of ammo: plicity of spaced colored lines "or dots, all those of each color being'specifically an gulated with respect to all of each other color, and forming interstices between color deposits, "transferring the coloring materials'tof a vitreousbbjectyand subjecting th object s ojtreated'to a temperature sufiicientto fuse the ceramic coloring materials with the obj ect and expel the 1 bondingmaterial in the form of gas which passes off through the interstices between the color deposit's.

4. That method of multi-color decoratin vitreous objects which comprises the steps of coating a transfer sheet with suitable sizing, imprinting thereon a "multi-color desi'gnin the form of a multiplicity of spacedlines' or 'dots, all thosefor eachcolor b'eing specificallyangulated withrespect to allior each other color and'form'ihg interstices "therebetween, successively dusting different portions of the imprinted design sepa rately with different ceramic coloring materials,

transferring the coloring materials to a'vitreous i't e sewer-Q 1 object, and subjecting theiatter a temperature sufiic'ient to fuse the ceramic coloring materials with the object and expel sizing in thetorm of gas which passes 011 through the interstices bes tweenthe color deposits. p a a 5. That method of multi-color decorating vitreous objects which comprises the stepsyof forming a transfer sheet by applying to the face thereof a ceramic color bondyseparately applying to such bond successive diflerent coloring materials-in the form of a multiplicity of spaced 1 colored lines or dots, all those of each color being specifically angulated with respect to "all of each sign in the form of a sign in the form of a multiplicity of lines or dots, l

those for each colorbeingall specifically angu lated with respect to those for each otherfcolor whereby interstices between color deposits are @formed. BQA transfer sheet those for each color lated with respectto those for each other color other color and forming interstices between color deposits, coating the coloring niaterialsand the interstices therebetween .with a suitable flux,

transferring the coloring materials and flux toa vitreous object, and subjecting the object so treated toa temperature sumjcient to fuse the ceramic coloring materials with the object.

form ofa multiplicltyof linesor'dotspthose for whereby interstices between color deposits are formed, said color being coated with a suitable flux.

9.That step in the muiti-color decorationof vitreous objects which consists in forming a transfer sheet by applying to the surface thereof 20 6, A vitreous object having fused to the surface thereof ceramic coloring materials in the each colorbeing ailspeciflcally angulated witha respect to those for each other color whereby in a'tersticesbetween color deposits are formed;

a ceramic color bond; and separately applyingto l such bond successive diiferent ceramicqcoloring a a "materials in the forn i of a multiplicltyiof spaced I icolorediines or dots, all'thoseof each color being a a I specifically angulated with respect to all oteach forminginterstices between color a inse m ul other color and deposits.

7. arransrer sheethaving imprinted thereon ,1 in ceramic coloring materials a multi-color de-J having imprinted thereon] in "ceramic coloring materials a muiti col or demultiplicityoflines or dots, being all specificallyangumaterials and theinter stices 

